On a novel tracking differentiator design based on iterative learning in a moving window
Xiangyang Li1
Rafal Madonski2
Zhiqiang Gao3
Senping Tian1
1.Key Laboratory of Autonomous Systems and Network Control,Ministry of Education,School of Automation Science and Engineering,South China University of Technology,Guangzhou 510641,China2.Energy and Electricity Research Center,Jinan University,Zhuhai 519070,China3.Department of Electrical and Computer Science,Cleveland State University,Cleveland,OH 44115,USA
摘要：Differential signals are key in control engineering as they anticipate future behavior of process variables and therefore are critical in formulating control laws such as proportional-integral-derivative(PID).The practical challenge,however,is to extract such signals from noisy measurements and this difficulty is addressed first by J.Han in the form of linear and nonlinear tracking differentiator(TD).While improvements were made,TD did not completely resolve the conflict between the noise sensitivity and the accuracy and timeliness of the differentiation.The two approaches proposed in this paper start with the basic linear TD,but apply iterative learning mechanism to the historical data in a moving window(MW),to form two new iterative learning tracking differentiators(IL-TD):one is a parallel IL-TD using an iterative ladder network structure which is implementable in analog circuits;the other a serial IL-TD which is implementable digitally on any computer platform.Both algorithms are validated in simulations which show that the proposed two IL-TDs have better tracking differentiation and de-noise performance compared to the existing linear TD.
机标关键词：learningwindowdesignmovingnovelbaseddifferentiatoriterative
论文发表日期：2023-02-05
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：10( 46-55 )
英文信息